Compensating-rod connection for scales.



J. 1.. GOOD, GOMPEKSAiTING BOD GUNNEGTION FOB SGALES. APPLICATION IILBD D110. 30, 1907.

Patented Jan. 19, .1909.

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JACOB L. GOOD, OF DETROIT, MICHIGAN, ASSIGNOR TO THE COMPUTING SCALE COMPANY,

OF DAYTON, OlllO, A

CORPORATION OF OHIO.

Specification of Letters Patent.

' Patented Jan, 19, 1909.-

Application filed December 30, 1907. Serial No. 08,585.

To all whom it may concern:

Be it known that 1, Jason L. G001), a citizen of the United States of America, rosiding at Detroit, in the county 01 Wayne and 5 State of Michigan, have invented certain new and useful Improvements in Compensating-Rod Connections for Scales, of which the f'dllowing is a specification, reference being had therein to the accompanying drawings.

Theinvention relates to scales of that type in which a variable resistance is employed, and the invention has more particular reference to the transmission mechanism through which the movement of the scale latform is transferred to the index.

It is the object of the invention to obtain a compensating transmission whereby the variable movement of the weighing mechanism will correctly operate an index in con? nection with a scalehaving uniform gradations thereon, and it is a further object to effect this result without the use of flexible connections, such as steel tapes, which have heretofore been employed forthc purpose.

To this end the invention consists in the peculiar construction of compensating transmission as hereinafter set forth.

In the drawings, Figure 1 is a sectional elevation of the d vice; and Fig. 2 is a similar view viewed at right angles to Fig. 1.

A is the index band, B the link or rod for actuating this index, and C the lever or beam of the scale for actuating the link 13. As shown, the variable resistance for the scale is in the form of a pendulum weight A, which is connected to the index A and is deflected laterally by the movement of the lever C and rot transmission is urd and the index A, construction: I) in dicates the a m. of the index and penduhnn weig are knife-edge pivots, and F i-shaped bearings supporting said pivots. L is a member connected to the movable index and pendulum weight, and K is a cohperating member attached to the rod B, the said men'ibers being in peripheral contact with each other. The contacting! surfaces of said members a e so fashioned that when the mei'nbcr L veil about the axis ii the men' V will roll in contact with the a d" of sail n'iemhcr L, and

peripheral (,5 said rolling contact sur tacos are so fashioned ,one'end is provided with a Vshaped bear-- ward movement of the link as to produce the desired compensation in the movement of the index A, and slipping of the surfaces of the members L and upon each other is prevented by a connection between said members which holds them in contact with each other while permitting the point of contact to travel. As illustrated, the connection between the members L and K is formed by a link G, which ating engaging a knife-edge'pivot H on, the 7 member L, and at its opposite end has a similar bearing for engaging a knife-edge pivot I on the member 13. The pivots H and I are so located upon their respective members, and in relation to the rolling contact surfaces thereof, that the distance between the knife-edges of said pivots remains constant, while the surfaces roll in relation to each other. At the same time, the link G holds the two members together so that the substantially rectilinear movement of the. link B will be transformed into angular movement of the member B and the index and pendulum weight attached thereto.

In the specific construction shown, the contacting surfaces of the members L and K are arcs of circles, and the surface ofthe member L is eccentric to the axis D of rotation. To provide means for accurately adjusting the mechanism, the member L is. preferably rotatively adjustable in relation'to the index and pendent weight, and to this endthe pivots E are provided with a cylindrical por.- Lion M on which the'member Lissccured by means of a set screw L. T N is a finger projecting from the member, L, and O are adjusting screws engaging the finger N and adapted to be adjusted in relation to the index A. r Viith the construction as described, the movement of the beam C will cause a down- B and member K at the upper end thereof. This member K being held in contact with the periphery .l of the member L by means of the link Grit is obvious that motion will be transmitted to said member L causing the angular movcincnt thereof and the index A and pendent weight A attached thereto. During this n'iovei'nent, the rolling oi the surfaces of the members L and K in contact with each other will cllcct a change in leverage which com-- ponsai-es for the varying resistance of the pendent weight A so that an indicator, hav- What'i claim as my 1. In a scale a comprlsmg 115 Q and a subsmnnmiy atmg member there: eral surfaces 1n 1:0

other a ink cu for holding" b he same in 2. In a scaie a 00m comprising an an 111G 31: mm 0 2 member, an izzctu:

chhrvving tssuffne surface of member carried by mpheml surface in roll angularly movabie nesting said me main at constant during the rolling c said members In testimony signature 45 of 3. In a, scale, c01 comprlsmg an angina.

and substantially 've 

